package com.briup.estore.web.filter;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.annotation.WebInitParam;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;

/**
 * 编码过滤器
 */
@WebFilter(value = "/*",initParams = {
        @WebInitParam(name = "encoding",value = "utf-8")
})

public class EncodingFilter implements Filter {
    private String encoding;

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        encoding = filterConfig.getInitParameter("encoding");
        if(encoding == null){
            encoding = "utf-8";
        }

    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        // 如果遇到css文件或者遇到js文件，放行
        HttpServletRequest req = (HttpServletRequest) request;
        if(req.getRequestURI().contains(".css") ||
                req.getRequestURI().contains(".js") ){
            chain.doFilter(request,response);
        }

        // 编码
        request.setCharacterEncoding(encoding);
        response.setCharacterEncoding(encoding);
        // response.setContentType("text/html;charset="+encoding);
        chain.doFilter(request,response);
    }

    @Override
    public void destroy() {

    }
}
